Unreal Engine Issues
Unreal Engine Issues
Check the status of an issue or Search for an existing issue.
Water plugin's RVT/ISR shader permutations fail PSO creation with instanced stereo (D3D12 SM6)
UE - Rendering - Architecture - RHIWith Instanced Stereo Rendering enabled and the Water plugin enabled (default), PSO precaching speculatively compiles WorldGridMaterial × FWat...
UBackgroundBlur crashes at PSO creation under D3D12 SM6 when stereo rendering is enabled
UE - Editor - UI Systems - SlateAny Slate widget that triggers the Slate post-process blur (e.g., a UBackgroundBlur with non-zero strength) hits a fatal D3D12 CreateGraphicsP...
Crash in UWidgetAnimation::CreateDirectorInstance when switching resolution
UE - Anim - SequencerHello, We've encountered a crash in UWidgetAnimation::CreateDirectorInstance when repeatedly switching resolutions. We've had it for a while ...
Instanced Actors: PCG on RuntimeGrid "None" assigns created IAManagers RuntimeGrid "MainGrid", causing cross-grid reference
UE - World Creation - Procedural Tools - PCG GraphContext PCG can be used to spawn Instanced Actors via the PCG IA Interop plugin, that makes Spawned Instanced Actors available as node. When ...
Instanced Actors: Moving element in editor is not undoable
UE - Engine Scaling - MassContext Instanced Actors can be moved by unchecking Lock Instance Locations on an IAM, and double-clicking into the actor → comp → instance t...
Lumen lighting in Presentations may appear darker than in Viewport
TM - RenderingReported in SF [Link Removed] In some scenes with Lumen enabled, interior scene lighting without direct lighting can appear drastically darke...
Instanced Actors: PCG on RuntimeGrid "None" assigns created IAManagers RuntimeGrid "MainGrid", causing cross-grid reference
UE - World Creation - Procedural Tools - PCG GraphContext PCG can be used to spawn Instanced Actors via the PCG IA Interop plugin, that makes Spawned Instanced Actors available as node. When ...
Twinmotion sign-in error when attempting sign-in inside app
TM - CoreReported in SF [Link Removed] Attempting to sign into Twinmotion from within the TM 2026.1 editor results in a consistent sign-in error using...
[Enhanced Input] Chord trigger fails when its referenced action lives in a lower-priority IMC
UE - Gameplay - InputSummary A UInputTriggerChordAction does not fire when the action it references (the "chording action") is mapped in a different Input Mapping C...
AutoSize triggers ensure on shortened Skel Anim Section moved past anim length
UE - Anim - SequencerIn Sequencer, calling "Edit > Auto Size" on a UMovieSceneSkeletalAnimationSection triggers the LowerBound > UpperBound ensure in UMovieSceneSe...
